The Duke And Duchess of Cambridge - Official Tour Portrait

Handout

In this handout image supplied by St James's Palace, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose for the official tour portrait for their trip to Canada and California in the Garden's of Clarence House on June 3, 2011 in London. England. This image has been released on October 26, 2011 to coincide with the Royal couple's visit to UNICEF next week in Copenhagen.

In this handout image supplied by St James's Palace, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose for the official tour portrait for their trip to Canada and California in the Garden's of Clarence House on June 3, 2011 in London. England. This image has been released on October 26, 2011 to coincide with the Royal couple's visit to UNICEF next week in Copenhagen.

Royal Wedding - Carriage Procession To Buckingham Palace And Departures

Chris Jackson

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile following their marriage at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile following their marriage at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding.

Clarence House Announce The Engagement Of Prince William To Kate Middleton

Chris Jackson

Prince William and Kate Middleton pose for photographs in the State Apartments of St James Palace on November 16, 2010 in London, England. After much speculation, Clarence House today announced the engagement of Prince William to Kate Middleton. The couple will get married in either the Spring or Summer of next year and continue to live in North Wales while Prince William works as an air sea rescue pilot for the RAF. The couple became engaged during a recent holiday in Kenya having been together for eight years.

Prince William and Kate Middleton pose for photographs in the State Apartments of St James Palace on November 16, 2010 in London, England. After much speculation, Clarence House today announced the engagement of Prince William to Kate Middleton. The couple will get married in either the Spring or Summer of next year and continue to live in North Wales while Prince William works as an air sea rescue pilot for the RAF. The couple became engaged during a recent holiday in Kenya having been together for eight years.

The Duke And Duchess Of Cambridge Arrive In New York

Samir Hussein

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City.

The Duke And Duchess of Cambridge - Official Tour Portrait

Handout

In this handout image supplied by St James's Palace, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose for the official tour portrait for their trip to Canada and California in the Garden's of Clarence House on June 3, 2011 in London. England. This image has been released on October 26, 2011 to coincide with the Royal couple's visit to UNICEF next week in Copenhagen.

In this handout image supplied by St James's Palace, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose for the official tour portrait for their trip to Canada and California in the Garden's of Clarence House on June 3, 2011 in London. England. This image has been released on October 26, 2011 to coincide with the Royal couple's visit to UNICEF next week in Copenhagen.

Clarence House Announce The Engagement Of Prince William To Kate Middleton

Chris Jackson

Prince William and Kate Middleton pose for photographs in the State Apartments of St James Palace on November 16, 2010 in London, England. After much speculation, Clarence House today announced the engagement of Prince William to Kate Middleton. The couple will get married in either the Spring or Summer of next year and continue to live in North Wales while Prince William works as an air sea rescue pilot for the RAF. The couple became engaged during a recent holiday in Kenya having been together for eight years.

Prince William and Kate Middleton pose for photographs in the State Apartments of St James Palace on November 16, 2010 in London, England. After much speculation, Clarence House today announced the engagement of Prince William to Kate Middleton. The couple will get married in either the Spring or Summer of next year and continue to live in North Wales while Prince William works as an air sea rescue pilot for the RAF. The couple became engaged during a recent holiday in Kenya having been together for eight years.

The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son

Chris Jackson

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.

Queen Elizabeth II's Birthday Parade: Trooping The Colour

Max Mumby/Indigo

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch the fly-past from the balcony of Buckingham Palace during Trooping the Colour, Queen Elizabeth II's Birthday Parade on June 14, 2014 in London, England.

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch the fly-past from the balcony of Buckingham Palace during Trooping the Colour, Queen Elizabeth II's Birthday Parade on June 14, 2014 in London, England.

The Duke & Duchess Of Cambridge Attend A Service Of Remembrance

Chris Jackson

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend a WW1 100 Years Commomoration Ceremony at Le Memorial Interallie on August 4, 2014 in Liege, Belgium. Monday 4th August marks the 100th Anniversary of Great Britain declaring war on Germany. In 1914 British Prime Minister Herbert Asquith announced at 11pm that Britain was to enter the war after Germany had violated Belgium's neutrality. The First World War or the Great War lasted until 11 November 1918 and is recognised as one of the deadliest historical conflicts with millions of casualties. A series of events commemorating the 100th Anniversary are taking place throughout the day.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend a WW1 100 Years Commomoration Ceremony at Le Memorial Interallie on August 4, 2014 in Liege, Belgium. Monday 4th August marks the 100th Anniversary of Great Britain declaring war on Germany. In 1914 British Prime Minister Herbert Asquith announced at 11pm that Britain was to enter the war after Germany had violated Belgium's neutrality. The First World War or the Great War lasted until 11 November 1918 and is recognised as one of the deadliest historical conflicts with millions of casualties. A series of events commemorating the 100th Anniversary are taking place throughout the day.

The Duke And Duchess Of Cambridge Arrive In New York

Samir Hussein

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City.

Invictus Games: Athletics

Max Mumby/Indigo

Prince William, Duke of Cambridge, Prince Charles, Prince of Wales & Prince Harry look at a mobile phone as they watch the athletics during the Invictus Games at the Lee Valley Athletics Centre on September 11, 2014 in London, England.

Prince William, Duke of Cambridge, Prince Charles, Prince of Wales & Prince Harry look at a mobile phone as they watch the athletics during the Invictus Games at the Lee Valley Athletics Centre on September 11, 2014 in London, England.

Royal Wedding - Carriage Procession To Buckingham Palace And Departures

Chris Jackson

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile following their marriage at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile following their marriage at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding.